Water-tube for steam-generators.



UNITED STATES PATENT OFFICE.

WATER-TUBE FOR STEAM-GENERATORS.

Specification of Letters Patent.

Patented sept. 19, 1905.

Application filed May 3, 1904:. Serial No. 206,204.

To a/ZZ whom it may concern:

Be it known that I, WILLIAM AMBLER, a subi ject of the King of GreatBritain and Ireland,

and a resident of Bradford, England, have invented certain new anduseful Improvements in Water-Tubes for Steam-Generators,` (for which Ihave filed an application for British Patent No. 15,1911, dated July 9,1903;) and I do hereby declare the following to be a full, clear, andexact description of the same.

This invention relates to steam-generators and water-tubes therefor ofthat class wherein the tubes project from the water-chamber into thefire-chamber of the generator, and has for its main object to facilitatethe liberation of steam and to improve the water circulation within suchtubes and to obtain a consequent more economical utilization of fuel.

To this end the invention is characterized by the application to thewater-tube of a division-plate so adapted as-to partition itlongitudinally into under and upper compartments, which continue the oneinto the other at the closed end of the water-tube, where a sufficientspace is left between the water-tube and division-plate for a free flowof the water, and as to cause the inlet to the under compartment fromthe water-chamber of the generator to be at a level lower than that ofthe outlet from the upper compartment to said water-chamber, so as tocause the under compartment to serve for the downflow from saidwater-chamber and such downiiow to be subjected to the greatest heat andthe upper compartment to serve for the return or up current back to saidwater-chamber, and as to connect such-compartments at a plurality ofplaces along the division-plate by inclined channels adapted toJfacilitate the liberation of steam generated in thedowniiow-compartment and its escape to the upflow-compartment, so as tomaintain the water-body circulating through the compartment subjected tothe greatest heat at practically the density of its inlet, andconsequently at its highest heat conductivity, and at the same time todecrease the density of the water body circulating through theupiiow-compartment by the displacement eifected by the steam particlesescaping thereinto, and so to improve the circulation.

On the accompanying drawings, Figure 1 represents a generatorwater-chamber iitted with inclined Watertubes adapted in accordance withthe invention. Fig. 2 represents an application of horizontalwater-tubes so adapted. Fig. 3 represents an inner end elevation and asection of the water-tube represented in Fig. 1. Fig. 4 represents likeviews of the water-tube represented in Fig. 2, and Fig. 5 representsdifferent formations of the division-plate.

e represents the generator water-chamber, a a dependingextensiontherefrom having a partition ft2, and b the water-tube whichprojects from said chamber or extension into the fire chamber. drepresents said divisionplate, which may be flat or arched and isarranged diametrically ofthe water-tube, so as to partition the tubeinto under and upper compartments b 62, which continue the one into theother at the closed end b3. The inlet c from'the chamber a or its vextension to the compartment b is located at a level lower than that ofthe outlet f from the compartment b2 to such chamber or extension, so asto cause the compartment b to serve for the downcurrent and such currentto be subjected to the most intense heat and the compartment b2 to servefor the upcurrent.

Throughout or for the greater part of its length the division-plate isadapted to connect the compartments b b2 at a plurality of places' byinclined channels d', having upper or under projecting parts or duc'tsZ2 adapted to intercept or lead any steam particles generated within thecompartment b and conduct them to the compartment b2, whence they escapewith the return-current, so as to free the downflow-water from suchparticles and leave the same in a denser condition of correspondinglyhigher heat conductivity, while lessening the density of theupflow-water.

What I claim is- 1. In a steam-generator, a water and steam chamber, aWater-tube projecting downward from the lower portion of the water andsteam chamber closed at the outer end, a divisionplate extendingdownward from the mouth of the tube nearly to the closed end thereofdividing the water-tube into two chambers or passages communicating atthe outer end, such division plate having orifices at intervals throughthe same forming communications between the two chambers, and alsoflanges projecting into the lower chamber or passage IOO In .testimonywhereof I have signed this specification in the presence of twosubscribing'witnesses.

WlLLIAM AMBLER. Witnesses:

JAMES STUART GROSSE, HERBERT HARRISON.

